Electrical control of terahertz nano antennas on VO2 thin film.
| Autor: | Jeong YG; Department of Physics and Astronomy and Center for Subwavelength Optics, Seoul National University,Seoul, 151-747, Republic of Korea. ygjeong@phya.snu.ac.kr, Bernien H, Kyoung JS, Park HR, Kim HS, Choi JW, Kim BJ, Kim HT, Ahn KJ, Kim DS |
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| Jazyk: | angličtina |
| Zdroj: | Optics express [Opt Express] 2011 Oct 24; Vol. 19 (22), pp. 21211-5. |
| DOI: | 10.1364/OE.19.021211 |
| Abstrakt: | We demonstrate an active metamaterial device that allows to electrically control terahertz transmission over more than one order of magnitude. Our device consists of a lithographically defined gold nano antenna array fabricated on a thin film of vanadium dioxide (VO(2)), a material that possesses an insulator to metal transition. The nano antennas let terahertz (THz) radiation funnel through when the VO(2) film is in the insulating state. By applying a dc-bias voltage through our device, the VO(2) becomes metallic. This electrically shorts the antennas and therefore switches off the transmission in two distinct regimes: reversible and irreversible switching. (© 2011 Optical Society of America) |
| Databáze: | MEDLINE |
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